CN106123980A - A kind of probe type flow meter based on fiber grating - Google Patents
A kind of probe type flow meter based on fiber grating Download PDFInfo
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- CN106123980A CN106123980A CN201610427834.XA CN201610427834A CN106123980A CN 106123980 A CN106123980 A CN 106123980A CN 201610427834 A CN201610427834 A CN 201610427834A CN 106123980 A CN106123980 A CN 106123980A
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- fiber grating
- flow meter
- type flow
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- strain rod
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/66—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
- G01F1/661—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters using light
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- Electromagnetism (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Optical Transform (AREA)
Abstract
The present invention proposes a kind of probe type flow meter based on fiber grating, is made up of shell 1, strain rod 2, fixing seat 3, front fiber grating 4, rear fiber grating 5, pad 6.Strain rod 2 is hollow cylinder structure, and its viscous posts front fiber grating 4 and rear fiber grating 5.Fluid impact strain rod 2 causes front fiber grating 4 and rear fiber grating 5 to produce strain, is realized the measurement of flow by the difference measuring two center reflection wavelength of front fiber grating 4 and rear fiber grating 5.This structure avoids fibre-optical probe directly to contact with fluid, it is achieved to front fiber grating 4 and the protection of rear fiber grating 5.The present invention solves that fibre-optical probe in existing fiber effusion meter was easily lost efficacy by fluid scouring or pollution, crushing is relatively big and complex structure and other problems.
Description
Technical field
The present invention relates to a kind of probe type flow meter based on fiber grating, belong to flow measurement technical field.
Background technology
Flow measurement is one of ingredient of measuring science technology, is widely present in petroleum gas, petrochemical industry, water
The industries such as process, food and drink, pharmacy, the energy, metallurgy, paper pulp papermaking and construction material.At present, conventional effusion meter mainly wraps
Include differential pressure flowmeter, spinner flowmeter, turbine flowmeter etc..These effusion meters are the most all to be recorded power by electric transducer, shaken
Move and tach signal, be converted to uninterrupted through signal.But, electrical sensor, easily by electromagnetic interference, easily leaks electricity, it is impossible to
Adverse circumstances for strong electromagnetic.
Fibre Optical Sensor utilizes light to sense and transmits, the most not by electromagnetic interference.Meanwhile, Fibre Optical Sensor has footpath
Carefully, matter soft, lightweight, insulation, advantage water-fast, high temperature resistant, corrosion resistant.In recent years, Fibre Optical Sensor quickly grows, many bases
Effusion meter in Fibre Optical Sensor is suggested.
Li Chuan et al. proposes a kind of target type fiber grating liquid flowmeter (Chinese invention patent application
20091004845.0), this effusion meter utilizes the circle device such as target, connecting rod that in the power justified on target, fluid matasomatism is passed to optical fiber
Grating, realizes the measurement of flow by measuring the movement of fiber grating center reflection wavelength.This design is realized by shaft-seal diaphragm
Sealing, structure is complicated, and reliability is low.Meanwhile, this kind of effusion meter is due to the introducing of circle target, and the flowing of convection cell defines bigger
Interference, and bigger crushing can be produced.
Zhang Wentao et al. proposes a kind of Optical Fiber Vortex-Shedding Flowmeter (Chinese invention patent application 201210464800. X),
This kind of effusion meter arranges eddy generator in a fluid, is alternately produced well-regulated whirlpool in eddy generator both sides, by light
Fine vortex frequency of measuring realizes the measurement of flow.This design is provided with the dresses such as eddy generator, connecting rod, location diaphragm in the duct
Putting, structure is complicated, installation difficulty, and fluid flow impact simultaneously is relatively big, can produce bigger crushing.
Du Yuhuan et al. proposes a kind of double-round coaxial-type optic fibre turbo flowmeter, and (Du Yuhuan, Guo Yingqing, Xue Haidong open
Little, Ding Yi, " intelligentized design of double-round coaxial-type optic fibre turbo flowmeter ", and intelligent instrument and sensing technology, 2015,23
(10): 3563-3566).Fluid flow information is converted to secondary speed information by this kind of effusion meter, utilizes Fibre Optical Sensor to survey
Amount secondary speed, it is achieved the measurement of flow.This design is disadvantageous in that, fibre-optical probe is easily damaged by fluid contamination, makes
Obtain effusion meter and cannot keep calibration characteristics, for a long time.
The present invention has proposed probe type flow meter based on fiber grating a kind of, utilize strain rod 2 by fluid matasomatism in
The power of strain rod 2 passes to fiber grating, realizes the measurement of flow by measuring fiber grating center reflection wavelength.Front optical fiber light
Grid 4 and rear fiber grating 5 are pasted on excellent 2 inwalls of strain, it is to avoid it directly contacts with fluid, it is achieved to front fiber grating 4 He
The protection of rear fiber grating 5.Meanwhile, strain rod 2 is hollow cylinder structure, and volume is little, and the fluid resistance caused is little, therefore this stream
The crushing that gauge produces is little.
Summary of the invention
(1) to solve the technical problem that
It is an object of the invention to propose a kind of probe type flow meter based on fiber grating, to solve in existing fiber effusion meter
Fibre-optical probe is easily damaged by fluid scouring or pollution, crushing is bigger and baroque problem.
(2) technical scheme
For reaching above-mentioned purpose, the present invention proposes a kind of probe type flow meter based on fiber grating, and this effusion meter includes: will visit
The shell 1 that pin type effusion meter is connected with tested pipeline；Sensing fluid pressure and the strain rod 2 of installation fiber grating；Fixing strain
The fixing seat 3 of rod 2；For sensing the front fiber grating 4 of strain rod 2 produced strain under fluid pressure effect and rear optical fiber
Grating 5；For the pad 6 sealed.
In such scheme, the connected mode of described shell 1 is Flange joint.
In such scheme, described strain rod 2 is hollow cylinder structure.
In such scheme, described fixing seat 3 center has through hole 7, for fixing strain rod 2, and fixing seat 3 and shell
The connected mode of 1 is Flange joint.
In such scheme, described front fiber grating 4 and rear fiber grating 5 are installed on the inwall of strain rod 2.
In such scheme, described pad 6 is loop configuration, and has through hole 8, is used for laying fastening screw.
(3) beneficial effect
From technique scheme it can be seen that the method have the advantages that
1) probe type flow meter based on fiber grating that the present invention proposes, installs front fiber grating 4 and rear fiber grating 5
On the inwall of strain rod 2, it is to avoid it is damaged by fluid impact, improve the service life of effusion meter.
2) probe type flow meter based on fiber grating that the present invention proposes, only strain rod 2 are placed in fluid, and should
Becoming excellent 2 volumes little, the resistance of fluid flow is little, and therefore this effusion meter crushing is little.
3) probe type flow meter based on fiber grating that the present invention proposes, utilizes strain rod 2 directly to be passed by fluid pressure
Pass front fiber grating 4 and rear fiber grating 5, simple in construction, easy for installation.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of probe type flow meter based on fiber grating.Wherein, in figure, sequence number is as follows: 1-
Shell, 2-strain rod, 3-fix before seat, 4-fiber grating, 6-pad after fiber grating, 5-.
Fig. 2 is fixed seat structure schematic diagram.Wherein, in figure, sequence number is as follows: 7-through hole.
Fig. 3 is gasket construction schematic diagram.Wherein, in figure, sequence number is as follows: 8-through hole.
Fig. 4 is front fiber grating 4 and the spectrogram of rear fiber grating 5 under different in flow rate.
Fig. 5 is the center reflection wavelength difference relation curve with flow velocity of front fiber grating 4 and rear fiber grating 5.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with specific embodiment, and reference
Accompanying drawing, is described in further detail concrete structure, principle and the optimization process of the present invention.
As shown in Figure 1, Figure 2, Figure 3 shows, a kind of probe type flow meter based on fiber grating, including shell 1, strain rod 2, consolidate
Reservation 3, front fiber grating 4, rear fiber grating 5, pad 6.Shell 1 is for by the probe type flow meter of design with tested pipeline even
Connecing, strain rod 2 is hollow cylinder structure, and front fiber grating 4 and rear fiber grating 5 are installed on the inwall of strain rod 2, fixing seat
3 are connected with shell 1 by flange connection, and fixing seat 3 has through hole 7, are used for installing strain rod 2, and pad 6 is installed on solid
Between reservation 3 and shell 1, seal.Its work process is: fluid flows through the strain rod 2 inserting pipeline, at strain rod 2
Surface produces thrust backward, forces strain rod 2 to produce yield deformation, so that being installed on the front optical fiber strained on excellent 2 inwalls
The centre wavelength of grating 4 and rear fiber grating 5 is moved, by calculating front fiber grating 4 and rear fiber grating 5 foveal reflex
Wavelength difference, just can obtain uninterrupted.
As shown in Figure 4, along with the increase of flow, the center reflection wavelength of front fiber grating 4 and rear fiber grating 5 left side respectively
Move right, read front fiber grating 4 and the center reflection wavelength of rear fiber grating 5 and carry out poor, obtaining front fiber grating 4 He
The center reflection wavelength difference of rear fiber grating 5 and the relation curve of flow, as shown in Figure 5.After it is demarcated, according to front
Fiber grating 4 and rear fiber grating 5 center reflection wavelength difference, just can obtain uninterrupted.
Claims (4)
1. a probe type flow meter based on fiber grating, this probe type flow meter includes: install probe type flow meter and reality
The shell 1 being now connected with tested pipeline, installs the strain rod 2 of front fiber grating 4 and rear fiber grating 5, installs consolidating of strain rod 2
Reservation 3, for sensing front fiber grating 4 and the rear fiber grating 5 of strain rod 2 produced strain under fluid pressure effect,
For the pad 6 sealed.
A kind of probe type flow meter based on fiber grating, it is characterised in that: strain rod 2 is empty
Heart column structure, its one end is fixed on fixing seat 3, and one end is in free state, and free end is in pipeline center position.
A kind of probe type flow meter based on fiber grating, it is characterised in that: front fiber grating 4
With rear fiber grating 5 along straining excellent 2 axis direction symmetries and be pasted on the inwall of strain rod 2, and front fiber grating 4 and rear optical fiber light
Plane residing for grid 5 is parallel with shell 1 axis direction.
A kind of probe type flow meter based on fiber grating, it is characterised in that: fixing seat 3 is with outer
The connected mode of shell is Flange joint, and the center of fixing seat 3 has through hole 7, is used for installing strain rod 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610427834.XA CN106123980A (en) | 2016-06-17 | 2016-06-17 | A kind of probe type flow meter based on fiber grating |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610427834.XA CN106123980A (en) | 2016-06-17 | 2016-06-17 | A kind of probe type flow meter based on fiber grating |
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| CN201610427834.XA Pending CN106123980A (en) | 2016-06-17 | 2016-06-17 | A kind of probe type flow meter based on fiber grating |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107300401A (en) * | 2017-08-14 | 2017-10-27 | 东北大学 | The integral optical fiber sensing device that a kind of temperature, pressure and flow are measured simultaneously |
| CN110763291A (en) * | 2019-11-16 | 2020-02-07 | 重庆交通大学 | Fiber grating target type flowmeter |
| CN112577533A (en) * | 2020-11-26 | 2021-03-30 | 重庆交通大学 | Fiber grating multi-parameter composite sensor |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1035559A (en) * | 1987-12-04 | 1989-09-13 | 施鲁博格工业公司 | Vortex flowmeter transducer |
| JP2003287451A (en) * | 2002-03-27 | 2003-10-10 | Hitachi Cable Ltd | Optical flow-velocity sensor |
| CN101629836A (en) * | 2009-08-17 | 2010-01-20 | 昆明理工大学 | Target type fiber grating liquid flowmeter |
| CN102095451A (en) * | 2009-12-09 | 2011-06-15 | 天津金工机械设备制造有限公司 | Fiber grating liquid flow sensor with temperature compensation |
| CN102135440A (en) * | 2011-01-11 | 2011-07-27 | 华澳富通(天津)科技发展有限公司 | Optical fiber vortex shedding flowmeter capable of simultaneously measuring temperature |
| CN102980615A (en) * | 2012-11-16 | 2013-03-20 | 中国科学院半导体研究所 | Optical fiber vortex shedding flowmeter |
| CN105612410A (en) * | 2013-11-08 | 2016-05-25 | 莱恩特拉公司 | Sensor for monitoring rheologically complex flows |
-
2016
- 2016-06-17 CN CN201610427834.XA patent/CN106123980A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1035559A (en) * | 1987-12-04 | 1989-09-13 | 施鲁博格工业公司 | Vortex flowmeter transducer |
| JP2003287451A (en) * | 2002-03-27 | 2003-10-10 | Hitachi Cable Ltd | Optical flow-velocity sensor |
| CN101629836A (en) * | 2009-08-17 | 2010-01-20 | 昆明理工大学 | Target type fiber grating liquid flowmeter |
| CN102095451A (en) * | 2009-12-09 | 2011-06-15 | 天津金工机械设备制造有限公司 | Fiber grating liquid flow sensor with temperature compensation |
| CN102135440A (en) * | 2011-01-11 | 2011-07-27 | 华澳富通(天津)科技发展有限公司 | Optical fiber vortex shedding flowmeter capable of simultaneously measuring temperature |
| CN102980615A (en) * | 2012-11-16 | 2013-03-20 | 中国科学院半导体研究所 | Optical fiber vortex shedding flowmeter |
| CN105612410A (en) * | 2013-11-08 | 2016-05-25 | 莱恩特拉公司 | Sensor for monitoring rheologically complex flows |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107300401A (en) * | 2017-08-14 | 2017-10-27 | 东北大学 | The integral optical fiber sensing device that a kind of temperature, pressure and flow are measured simultaneously |
| CN110763291A (en) * | 2019-11-16 | 2020-02-07 | 重庆交通大学 | Fiber grating target type flowmeter |
| CN110763291B (en) * | 2019-11-16 | 2020-10-30 | 重庆交通大学 | Fiber grating target type flowmeter |
| CN112577533A (en) * | 2020-11-26 | 2021-03-30 | 重庆交通大学 | Fiber grating multi-parameter composite sensor |
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Application publication date: 20161116 |